JPS5851453Y2 - Power transmission coupling device - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a coupling device for transmitting power between a driving side device and a driven (driven) side device, and is widely used in special vehicles, construction machinery, and other power transmission devices in general. Applied.

Universal joints are generally used as couplings for power transmission shafts in vehicles, etc., but gear couplings are used when axial space is limited.

Gear couplings, which serve as a means of power transmission in vehicles, are often used in places where there is limited space, and their workability is poor and it takes a lot of time to attach and detach them. Ta.

An example of a conventional joint is shown in FIG.

This coupling device has a crowned external gear 10.
1a.

101b is attached to the drive shaft 102a and the driven shaft 102b, respectively, while internal gears 103a and 10 that mesh with these are attached.
They are connected by a coupling formed by 3b.

This coupling consists of two parts, splines 105
and are connected by screws 106.

One is the first coupling 104b that meshes with the external gear 101b of the driven shaft 102b, and the other is the drive shaft 102.
The second coupling 104a is engaged with the external gear 101a of the device A.

After being inserted between the gears 8 and 8, the gears are extended to mesh with each other and then tightened with a double nut 106 to be integrated.

Therefore, the attachment and detachment of the joint must be done from the outside space between the two devices A and B, that is, the tool and hand must be inserted between the two devices. If you try to make it narrower, there is a drawback that it becomes extremely difficult to attach and detach the joint.

Since this creates wasted space and prevents the device from becoming more compact, improvements have been desired.

SUMMARY OF THE INVENTION In response to the above-mentioned needs, the present invention aims to provide a joint device that can be easily attached and detached even if the distance between the devices is narrowed.

The configuration of the present invention to achieve such an objective is that, in a coupling device that connects a driving side device and a driven side device, a gear attached to the driving shaft, a gear attached to the driven shaft, and a gear attached to these gears are provided. a connecting sleeve having an internal gear that meshes with the moving element; a moving element having the connecting sleeve attached to one end and having a spline shaft formed at the other end and threadably moving within the driven shaft; It is characterized by comprising a switching sleeve that moves between a spline hole and a non-spline hole provided on the drive shaft, and a spring that presses and fits the switching sleeve into the spline hole of the driven shaft.

The configuration of the present invention will be described in detail below based on an embodiment shown in the drawings.

This coupling device has external gears 2at2b formed on the drive shaft 1a of the driving device A and the driven shaft 1b of the driven device B, respectively, and internal gears 3a, 3b that mesh with the gears 2a, 2b at both ends. The external gears 2a and 2b are connected by a connecting sleeve 4 formed on the outer surface of the drive shaft 1b to transmit rotational force. By moving the connecting sleeve 4 in the axial direction, it can be easily attached and detached.

The external gears 2a, 2b and the internal gears 3a, 3b are crowned to allow for slight misalignment of their axes.

The connecting sleeve 4 is connected to the driven shaft 1.
A disk-shaped plate 6 for connecting to the mover 5 in b is attached using a retaining ring or the like.

The plate 6 and the slider 5 are connected by a shaft 7, and a ball joint 8 is interposed between the plate 6 and the shaft 7 and between the shaft 7 and the slider 5, and the connecting sleeve 4 so that it can swing and rotate freely.

In FIGS. 2 and 3, the mover 5 has a left half formed into a cylindrical shape to accommodate the shaft 7, and a right half formed into a spline shaft (denoted by the reference numeral 10 as a spline) into which the switching sleeve 9 is fitted. has been done.

A male thread 12' is cut in the cylindrical portion and is threaded into the female thread 12 cut in a part of the through hole 11 cut in the driven shaft 1b. It is provided so as to move while making a screw movement within the drive shaft 1b.

The driven shaft 1b housing the mover 5 is rotatably attached to the driven device B, and the external gear 2b is integrally formed.

A flange 13 is formed behind the external gear 2b at the tip to support the connection sleeve 4 in a detached state.

The flange 13 and the external gear 2b provide two-point support for the retracting connecting sleeve 4 to prevent the tip of the connecting sleeve 4 from lowering.

This allows the connecting sleeve 4 to move parallel to the tooth traces of the external gear 2a.

In addition, the through hole 11 is a stepped hole that is narrower in the center, and the switching sleeve 9 is inserted into the right chamber by using this step.
A spring 15 is installed that pushes the spline into the right end spline hole (denoted by the reference numeral 14 as a spline).

In addition, a non-spline hole portion 16 is provided adjacent to the spline hole portion.
is provided.

This is a space for rotating the switching sleeve 9, and the switching sleeve 9 can only be positioned when the spring 15 is compressed.

The switching sleeve 9 has a spline hole that fits into the spline shaft 10 of the mover 5 and a spline hole 1 of the driven shaft 1b.
It is a cylindrical body having a spline shaft that fits into the driven shaft 1b and the spline shaft 10. prevent.

Note that a lid 17 is attached to the driven side device B to cover the driven shaft 1b.

This lid 17 has a hole 18 into which a tool 20 for rotating the switching sleeve 9 is inserted.

This hole 18 is a screw hole, and is normally filled with a plug 19 and closed.

The attachment/detachment operation of the joint device constructed in this manner is performed as follows.

(2) When the connection between the driving shaft 1a and the driven shaft 1b is released.

First, the plug 19 is removed, and the tool 20 is inserted through the hole 18 and inserted into the polygonal head of the switching sleeve 9.

Then push it in again. Then, the switching sleeve 9
moves from the spline hole portion 14 to the non-spline hole portion 16 and releases the engagement with the driven shaft 1b.

Then, if you turn the tool 20 to the left (for right-handed screws)
Since the moving element 5, which is engaged with the switching sleeve 9 through the spline 10, also rotates, it is moved to the right by the screw pair.

As the slider 5 moves to the right, the connecting sleeve 4 connected via the shaft 7 and plate 6 also moves, so that the external gear 2a of the drive shaft 1a and the connecting sleeve 4
The drive shaft 1a and the driven shaft 1 become disengaged from each other with the internal gear 3a.
The bond with b is broken.

At this time, the connecting sleeve 4 connects the external gear 2b and the flange 1.
Supported by 3.

2. When the driving shaft 1a and the driven shaft 1b are coupled.

This operation is the opposite of the release operation described above.

Push the switching sleeve 9 in with the tool 20 inserted into the switching sleeve 9, and then turn it clockwise.

As a result, the slider 5 moves to the left, and the external gear 2a of the driving shaft 1a and the internal gear 3a of the connecting sleeve 4 mesh with each other, thereby coupling the driving shaft 1a and the driven shaft 1b.

3. After installing and removing the fittings.

Spline 14 between switching sleeve 9 and driven shaft 1b
After aligning the two, pull out the tool 20.

Then, the switching sleeve 9 is pushed into the spline hole 14 by the force of the spring 15, so that the mover 5 and the driven shaft 1b are integrated.

Therefore, it is possible to reliably prevent the connecting sleeve 4 from moving during the transmission of rotational force, thereby preventing accidents caused by this.

In this way, according to the coupling device of the present invention, the tool can be inserted from the driven device side and rotated without having to insert a hand between the driving device and the driven device to attach or detach the coupling. Therefore, the space between the devices can be narrowed, and the device can be made more compact.

Moreover, since the work is simple by inserting and rotating the tool, the work time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view showing an example of a conventional joint device. FIG. 2 is a central vertical cross-sectional view (showing the coupling device) showing an embodiment of the joint device of the present invention, and FIG. In the drawings, A is a drive side device, B is a driven side device, 1a is a drive shaft, 1b is a driven shaft, 2a and 2b are external gears, and 3a
, 3b is an internal gear, 4 is a connecting sleeve, 5 is a mover, 9
is a switching sleeve, 10 is a spline, 12.12' is a female thread and a male thread, 14 is a spline, 15 is a spring,
16 is a non-spline hole portion.

Claims (1)

[Scope of utility model registration request] A coupling device that connects a driving side device and a driven side device, the coupling sleeve having a gear attached to the driving shaft, a gear attached to the driven shaft, an internal gear meshing with these gears, and a coupling sleeve having one end. A slider to which the connecting sleeve is attached and a spline shaft is formed at the other end and threadably moves within the driven shaft; a spline hole portion fitted to the spline shaft of the slider and provided in the driven shaft, and a spline-free slider; A power transmission joint device comprising: a switching sleeve that moves between the switching sleeve and the splined hole; and a spring that presses and fits the switching sleeve into the splined hole of the driven shaft.